Advice on smart thermostat/RF

[Harvest Fields]

The guys at Hive did not say their product is NOT compliant if not connected to the internet. Are you sure? There is no law saying a thermostat must be connected to the internet, is there? Or why would there stil be RF controls? Can you elaborate on your point please?
The Honeywell T4R is RF only, so I'd have to change the controls in a few months time.. so not ideal

By taking away the Internet from the Hive you are taking away the weather comp capability. You can have a hive but need to put in place External weather comp controls.

 

[bettyflo]

By taking away the Internet from the Hive you are taking away the weather comp capability. You can have a hive but need to put in place External weather comp controls.

HarvestFields, I see. thank you for your explanation. I will email my engineer!

 

[djchristoff]

825 is only a small output boiler, what size house / how many bedroom and bathrooms do you have?

 

[bettyflo]

825 is only a small output boiler, what size house / how many bedroom and bathrooms do you have?

1 have a flat: 2 bedrooms, 2 bathrooms, 1 lounge.
I don't heat the bedrooms, or the Hallway. So only 4 out of 7 radiators are on. Then 1 shower is electric, so effectively only the main bathroom is linked to the boiler.
the 825 is what the plumber recommends, and my corrent boiler is a Potterton suprima 40l which is sufficient.

 

[djchristoff]

825 is way too small. doesn't matter if you only have 4 out of 7 rads on at any one time, your plumber needs to calculate for the house and not just for you. 825 is suitable for a 1 bed/1 bath flat, you need the 830 or even better the 835. I prefer the ecotoc plus, its a bigger boiler and has SS heat exchanger and has been around for years and reliable. ecofit pure is relatively new but I fit them as they have a rear flue outlet which is very handy and they fit in a kitchen cupboard very nicely. They have a cast aluminium heat exchanger but as long as the system is flushed properly and chemically treated you shouldn't have any problems.

 

[bettyflo]

825 is way too small. doesn't matter if you only have 4 out of 7 rads on at any one time, your plumber needs to calculate for the house and not just for you. 825 is suitable for a 1 bed/1 bath flat, you need the 830 or even better the 835. I prefer the ecotoc plus, its a bigger boiler and has SS heat exchanger and has been around for years and reliable. ecofit pure is relatively new but I fit them as they have a rear flue outlet which is very handy and they fit in a kitchen cupboard very nicely. They have a cast aluminium heat exchanger but as long as the system is flushed properly and chemically treated you shouldn't have any problems.

Oh really?I was wondering about this as my neighbours (same flat as mine) has a 35Kw combi fitted last year, not a 25kwh.
Would this 835 give me better pressure in the sower than the 825?

 

[Harvest Fields]

825 is way too small. doesn't matter if you only have 4 out of 7 rads on at any one time, your plumber needs to calculate for the house and not just for you. 825 is suitable for a 1 bed/1 bath flat, you need the 830 or even better the 835. I prefer the ecotoc plus, its a bigger boiler and has SS heat exchanger and has been around for years and reliable. ecofit pure is relatively new but I fit them as they have a rear flue outlet which is very handy and they fit in a kitchen cupboard very nicely. They have a cast aluminium heat exchanger but as long as the system is flushed properly and chemically treated you shouldn't have any problems.

You tell the OP that the engineer should calculate the size of the apartment and that the boiler is to small but then you proceed to tell the OP they need an 830 or a 835?? Have you seen or measure and calculated the correct size of boiler needed for the apartment or are YOU just guessing?????

 

[djchristoff]

Just guessing as I don’t have havent seen the flat or have access to any calculations for the flat but a 25kw boiler is not big enough based on how many bed and bathrooms they have. What i should have said is you need an 830 or an 835 but would need to do the calculations first.

To the OP, an 835 would give a better hot water outlet to the shower but would also depend on incoming mains pressure and flow etc...

 

[ShaunCorbs]

Just guessing as I don’t have havent seen the flat or have access to any calculations for the flat but a 25kw boiler is not big enough based on how many bed and bathrooms they have. What i should have said is you need an 830 or an 835 but would need to do the calculations first.

To the OP, an 835 would give a better hot water outlet to the shower but would also depend on incoming mains pressure and flow etc...

Depends one bathroom-might have an electric shower

Unless your running a bath 25kw is big enough

 

[bettyflo]

To the OP, an 835 would give a better hot water outlet to the shower but would also depend on incoming mains pressure and flow etc...

thanks a lot. The flow is over 22l per minute but I don't know the pressure.